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Here's what happens to your knuckles when you crack them

Key Facts In This Video

  1. Synovial fluid is the lubricant found in between joints. 00:09

  2. The crack sound you hear when you stand up too quickly, it's probably just tendons slipping between muscles. 00:29

  3. Most medical findings suggest that cracking your knuckles does not cause arthritis. 00:56